%% 
%%  Ein Beispiel der DANTE-Edition
%%  
%%  7. Auflage
%% 
%%  Beispiel 35-00-43 auf Seite 836.
%% 
%%  Copyright (C) 2016 Herbert Voss
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 
%% 
%% ==== 
% Show page(s) 1
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%% 
\documentclass[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{352.81416pt}
\setlength\parindent{0pt}
%StartShownPreambleCommands
\usepackage{pst-node}
%StopShownPreambleCommands
\begin{document}
\psset{unit=1.5}
\begin{pspicture}(0,0.5)(5,3)
  \cnode[fillstyle=solid,fillcolor=lightgray](1,1){1cm}{A}
  \cnode[fillstyle=solid,fillcolor=lightgray](4,1){1cm}{B}
  \pscustom[linecolor=blue,linewidth=0.1pt]{%
        \translate(1,1)
        \psline(0;60)(2;60)
  }
  \pscustom[linecolor=blue,linewidth=0.1pt]{%
        \translate(4,1)
        \psline(0;100)(2;100)
  }
  \psset{linewidth=1.5pt}
  \nccurve[angleA=60,angleB=100,linecolor=red]{A}{B}
  \pccurve[angleA=60,angleB=100,linecolor=cyan](A)(B)
\end{pspicture}
\end{document}